Erzahnenurgroßväter und andere Anverwandte

In Icelandic, the words for "grandfather" and "great-grandfather" are "afi" and "langafi", respectively (compare German "Opa" and "Uropa").

It turns out you add additional "langa-" prefixes to zip back through the generations, just like you can slap on additional "great" or "Ur-" prefixes in English and German. The longest example I've found is from this 2004 blog post, where the author talks about poking around in the Íslendingabók: